CN205091752U - Eliminate environment light flicker noise's bar code scanning apparatus and noise elimination circuit - Google Patents

Eliminate environment light flicker noise's bar code scanning apparatus and noise elimination circuit Download PDF

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CN205091752U
CN205091752U CN 201520726980 CN201520726980U CN205091752U CN 205091752 U CN205091752 U CN 205091752U CN 201520726980 CN201520726980 CN 201520726980 CN 201520726980 U CN201520726980 U CN 201520726980U CN 205091752 U CN205091752 U CN 205091752U
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light
noise
scanning
source
elimination
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CN 201520726980
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Chinese (zh)
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冯琛
任杰
陆骏
屈海明
张晴
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手持产品公司
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10851Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481Constructional features, e.g. arrangements of optical elements
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06018Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding
    • G06K19/06028Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding using bar codes
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10554Moving beam scanning
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10554Moving beam scanning
    • G06K7/10564Light sources
    • G06K7/10574Multiple sources

Abstract

The utility model provides an eliminate environment light flicker noise's bar code scanning apparatus and noise elimination circuit, bar code scanning apparatus include light source, first sensor, second sensor and noise elimination circuit. The light source is configured as the transmission light beam. The first sensor is configured as the first light signal that the light of bar code was left in the testing instruction reflection. The reverberation can stem from the light source and stem from near at least one the environment light source bar code scanning apparatus. The second sensor is configured as testing instruction and stems from the second light signal of the light of at least one environment light source. The noise elimination circuit is configured as from first and second light signals acquisition noise elimination scanning signal.

Description

一种消除环境光闪烁噪声的条形码扫描设备及噪声消除电路 A barcode scanning device for eliminating ambient light noise and flicker noise cancellation circuit

技术领域 FIELD

[0001] 本实用新型涉及噪声消除且更特别地涉及用于条形码扫描仪的环境光闪烁噪声消除。 [0001] The present invention relates more particularly to a noise canceling a bar code scanner for ambient light flicker noise cancellation.

背景技术 Background technique

[0002] —般而言,诸如紧凑式荧光灯(CFL)和发光二极管(LED)灯之类的节省光源近年来已经变得更加普遍。 [0002] - In general, light sources such as saving compact fluorescent (CFL) and a light emitting diode (LED) lamp or the like has in recent years become more prevalent. 然而,用这些光源,使更多的工作区域经受具有高频闪烁的环境光。 However, these light sources, so that more ambient light the work area subjected to a high frequency flashing. 基于激光的条形码扫描仪可能由于此类闪烁光干扰而经历适当地运行方面的困难。 Laser-based bar code scanner may flicker due to such interference light through a difficult aspect is operating properly.

[0003] 来自基于激光的条形码扫描仪附近的环境光的闪烁可以向条形码扫描仪的扫描光信号中引入噪声或干扰。 [0003] near the barcode scanner from the environment of the laser-based light flicker noise or interference can be introduced into the optical signal to the scan of the bar code scanner. 例如,荧光灯具有高频电子镇流器,并且发光二极管(LED)灯具有高频驱动器。 For example, a high frequency electronic ballast fluorescent lamps, and light emitting diode (LED) lamps have a high frequency driver. 这些高频部件在条形码符号上生成脉冲照明。 These high-frequency component to generate pulsed illumination on the bar code symbol. 此脉冲照明可以作为光学噪声被条形码扫描仪接收。 This pulsed illumination can be received as an optical bar code scanner noise. 噪声可以引入假边沿检测,其可以导致条形码扫描电路进行的困难或不正确的条形码解码。 Noise can be introduced into the false edge detection, which can lead to difficulties barcode scanning circuit or incorrect decoded bar code.

[0004] 图1A和1B是从在信号分析测试期间获得的屏幕快照导出以确定来自环境光的噪声和对基于激光的条形码扫描设备的适当扫描过程的后续干扰的图表。 [0004] FIGS. 1A and 1B are screen shots during derived from the test signal analysis are obtained to determine a subsequent ambient light interference noise from a scanning process and suitable for laser-based bar code scanning apparatus of the chart. 图1A的图表10示出了从第一条形码扫描过程接收的信号。 FIG 1A is a graph 10 shows the signal received from the first bar code scanning process. 在第一过程中,当特定环境光被关掉时获得条形码扫描信号。 In the first process, the bar code scanning signal is obtained when a particular ambient light is turned off. 图1B的图表12是从当环境光被开启时从另一条形码扫描过程接收的信号导出的。 FIG 12 is a graph 1B derived from the signal is turned on when the ambient light received from the other bar code scanning process. 具体地,条形码扫描信号是使用Honeywell型号1200g激光扫描仪获得的,并且环境光是Philips LED台灯型号69195。 In particular, the use of bar code scanning signal Honeywell 1200g laser scanner model is obtained, and the ambient light type 69195 Philips LED lamp. 如从在信号分析测试中获得的条形码扫描信号可以看到的,在条形码读取器附近的LED灯的存在创建使条形码不能被解码的此类噪声。 The signal obtained from the bar code scanning signal in the test can be seen in the analysis, so that such noise created barcode can be decoded in the presence of a bar code reader near the LED lamp.

[0005] 因此,存在一种需要,以用于使基于激光的条形码扫描仪或条形码读取器在某种类型的环境光源的高频闪烁照明附近适当地操作。 [0005] Accordingly, there is a need to for a laser-based bar code scanner or bar code reader is suitably operate near the high ambient light flashing illumination of some type.

实用新型内容 SUMMARY

[0006] 因此,在一个方面,本实用新型涵盖一种条形码扫描设备,其包括光源、第一传感器、第二传感器以及噪声消除电路。 [0006] Accordingly, in one aspect, the present invention encompasses a bar code scanning apparatus which includes a light source, a first sensor, a second sensor and a noise cancellation circuit. 光源被配置成发射光束。 The light source is configured to emit a light beam. 第一传感器被配置成检测指示反射离开条形码的光的第一光信号。 A first sensor configured to detect a first light signal indicative of light reflected off the bar code. 反射光源自于光源且源自于在条形码扫描设备附近的至少一个环境光源。 Light from the light source and reflected from at least one ambient light source is near the bar code scanning device. 第二传感器被配置成检测指示源自于所述至少一个环境光源的光的第二光信号。 The second sensor is configured to detect a signal indicative of the light originating from the second light source is at least one environment. 噪声消除电路被配置成从第一和第二光信号获得噪声消除扫描信号。 Noise canceling circuit is configured to obtain the noise cancellation scanning signal from the first and second optical signals.

[0007] 在另一示例性实施例中,提供了一种激光扫描装置。 [0007] In another exemplary embodiment, there is provided a laser scanning device. 激光扫描装置包括外壳、激光源、第一光电二极管、第二光电二极管以及噪声消除电路。 Laser scanning apparatus comprising a housing, a laser light source, a first photodiode, a second photodiode and a noise cancellation circuit. 激光源被配置成发射将跨条形码扫描的一束激光。 A laser source configured to emit a laser beam across the bar code scanning. 第一光电二极管被设置在外壳中并被配置成检测指示反射离开条形码的至少激光的第一光信号。 First photodiode is provided at least a first optical signal of the laser in the housing and configured to detect reflected off the bar code indicative. 第二光电二极管被设置在第一光电二极管附近的外壳外面,并被配置成感测第二光信号。 The second photodiode is disposed outside the housing near the first photodiode, and is configured to sense a second optical signal. 噪声消除电路被配置成从第一和第二光信号获得噪声消除扫描信号。 Noise canceling circuit is configured to obtain the noise cancellation scanning signal from the first and second optical signals. 第一和第二光电二极管被配置成接收源自于至少一个环境源的光。 The first and second photodiode is configured to receive light from the at least one environmental source.

[0008] 在又一示例性实施例中,提供了一种噪声消除电路。 [0008] In yet another exemplary embodiment, there is provided a noise canceling circuit. 该噪声消除电路包括至少一个光学传感器和差分放大器。 The noise cancellation circuit comprises at least one optical sensor and a differential amplifier. 所述至少一个光学传感器被配置成在第一级中检测第一光信号并在第二级中检测第二光信号。 At least one optical sensor is configured to detect a first optical signal at a first stage and a second optical signal detected in the second stage. 第一光信号包括激光扫描分量和噪声分量,并且第二光信号仅仅包括噪声分量。 The first optical signal comprises a laser scanning component and a noise component, and the second optical signal includes only the noise component. 差分放大器被配置成从第一光信号减去第二光信号以从而从第一光信号去除噪声分量。 Differential amplifier is configured so as to remove the noise component of the first optical signal from the optical signal by subtracting the second from the first optical signal. 该噪声分量对应于来自至少一个环境光源的环境光。 The noise component corresponding to the ambient light from the at least one ambient light source. 差分放大器被配置成输出噪声消除扫描信号。 Differential amplifier is configured to output the noise cancellation signal scan.

[0009] 在以下详细描述及其附图内进一步解释前述说明性概要以及本实用新型的其它示例性目标和/或优点以及其中实现其的方式。 [0009] further explanation of the foregoing illustrative summary of the present invention and other exemplary objectives and / or advantages in the accompanying drawings and the following detailed description thereof, and wherein the implemented embodiment.

附图说明 BRIEF DESCRIPTION

[0010] 图1A示意性地描绘了示出当环境光被关掉时在信号分析测试期间获得的第一条形码扫描信号的屏幕快照。 [0010] Figure 1A schematically depicts a screen shot when the first bar code scanning signal is switched off when the ambient light during the signal analysis test obtained are shown.

[0011] 图1B示意性地描绘了示出当环境光被开启时在信号分析测试期间获得的第二条形码扫描信号的屏幕快照。 [0011] Figure 1B schematically depicts a screen shot when the second barcode scanning signal when the ambient light is turned on during the test signal analysis obtained are shown.

[0012]图2示意性地描绘了根据本实用新型的一个实施例的激光条形码扫描仪的透视图。 [0012] FIG. 2 schematically depicts a perspective view of a laser bar code scanner of the embodiment of the present invention a.

[0013] 图3示意性地描绘了根据本实用新型的一个实施例的条形码读取器的剖视侧视图。 [0013] Figure 3 schematically depicts a cross-sectional side view according to the present invention a bar code reader embodiment.

[0014] 图4A示意性地描绘了根据本实用新型的实施例的包括图3中所示的传感器的第一传感器布置的前视图。 [0014] Figure 4A schematically depicts a front view of a first sensor arrangement comprises a sensor shown in FIG. 3 in the present embodiment of the invention.

[0015] 图4B示意性地描绘了根据本实用新型的实施例的包括图3中所示的传感器和参考传感器的第二传感器布置的前视图。 [0015] Figure 4B schematically depicts the front view of the arrangement according to the second sensor comprises a sensor as shown in FIG. 3 and reference sensor of the present embodiment of the invention.

[0016] 图4C示意性地描绘了根据本实用新型的另一实施例的包括图3中所示的传感器和两个参考传感器的第三传感器布置的前视图。 [0016] FIG 4C schematically depicts a front view of a third sensor comprises a sensor shown in FIG. 3 and two reference sensors of another embodiment of the present invention are arranged.

[0017] 图5示意性地描绘了根据本实用新型的第一实施例的噪声消除电路的电路图。 [0017] Figure 5 schematically depicts a circuit diagram of the cancellation circuit of the present invention, the noise of the first embodiment.

[0018] 图6示意性地描绘了根据本实用新型的实施例的用于图4B中所示的传感器布置的条形码的视图和每个传感器的条形码视场。 [0018] Figure 6 schematically depicts a view of the bar code field of view of each sensor and for the sensor shown in FIG embodiment of the present invention. 4B disposed barcode.

[0019] 图7示意性地描绘了根据本实用新型的实施例的用于图4C中所示的传感器布置的条形码的视图和每个传感器的条形码视场。 [0019] Figure 7 schematically depicts a view of the bar code field of view of each sensor and for the sensor shown in FIG embodiment according to the present embodiment of the invention arranged in barcode 4C.

[0020] 图8示意性地描绘了根据本实用新型的实施例的第四传感器布置的透视图。 [0020] Figure 8 schematically depicts a perspective view of a sensor arrangement according to a fourth embodiment of the present invention embodiment.

[0021] 图9示意性地描绘了根据本实用新型的实施例的第五传感器布置的光信号的表不ο [0021] Figure 9 schematically depicts a table of the optical signal sensor according to a fifth embodiment of the invention the arrangement does not ο

[0022] 图10示意性地描绘了根据本实用新型的实施例的用于图8中所示的传感器布置的条形码的视图和每个传感器的条形码视场。 [0022] FIG. 10 schematically depicts a view of the bar code field of view of each sensor and the sensor arrangement according to FIG illustrated embodiment of the present invention in Example 8 of the barcode.

[0023] 图11示意性地描绘了根据本实用新型的第二实施例的噪声消除电路的电路图。 [0023] FIG. 11 schematically depicts a circuit diagram of a noise elimination circuit according to the second embodiment of the present invention embodiment.

[0024] 图12示意性地描绘了根据本实用新型的第三实施例的噪声消除电路的电路图。 [0024] FIG. 12 schematically depicts a circuit diagram of a noise elimination circuit according to a third embodiment of the present invention embodiment.

[0025] 图13示意性地描绘了根据本实用新型的第四实施例的噪声消除电路的电路图。 [0025] FIG. 13 schematically depicts a circuit diagram of a noise elimination circuit according to a fourth embodiment of the present invention embodiment.

[0026] 图14示意性地描绘了根据本实用新型的第五实施例的噪声消除电路的电路图。 [0026] FIG. 14 schematically depicts a circuit diagram of a noise elimination circuit according to the present invention according to a fifth embodiment.

具体实施方式 detailed description

[0027] 本实用新型涵盖用于消除光信号、具体地由激光扫描仪获得的光信号的噪声分量的系统和方法。 [0027] The present invention encompasses optical signal is eliminated, in particular the system and method of optical signal noise components obtained by the laser scanner. 在本公开的某些实施例中,与激光扫描仪的常规光传感器相结合地使用一个或多个参考传感器。 In certain embodiments of the present disclosure, the conventional optical sensor of the laser scanner used in combination with one or more reference sensors. 参考传感器被配置成仅检测来自不同于期望激光源的源的环境光。 Reference sensor is configured to detect only ambient light from the laser light source is different from a desired source. 检测的环境光被从激光扫描信号减去以提供期望的噪声消除信号。 Detecting ambient light is eliminated by subtracting the signal from the laser scanning signal to provide the desired noise. 在本公开的其它实施例中,噪声消除电路包括延迟线、采样和保持电路、滤波器及其它电部件以消除来自激光扫描信号的噪声分量。 In other embodiments of the present disclosure, the noise elimination circuit comprises a delay line, a sample and hold circuit, a filter and other electrical components to remove noise components from the laser scanning signal.

[0028] 根据示例性实施方式,图2是基于激光的条形码扫描仪14或条形码读取器的实施例的透视图。 [0028] According to an exemplary embodiment, FIG. 2 is a perspective view of an embodiment of a laser-based bar code scanner or bar code reader 14. 可将条形码扫描仪14称为逆系统扫描仪(retro system scanner)。 The bar code scanner 14 may be called an inverse scanner systems (retro system scanner). 本公开的实施例参考用于逆系统扫描仪的噪声消除,然而至少一个实施方式可以适用于非逆系统扫描仪,如下面更详细地解释的。 Embodiment of the present disclosure with reference to the inverse of the noise canceling system of the scanner, however, at least one embodiment may be applied to a non-inverse scanner system, as explained in more detail below.

[0029]图3是设置在图2中所示的基于激光的条形码扫描仪14中的元件的实施例的剖视侧视图。 [0029] FIG. 3 is a sectional side view is provided in the embodiment of the element 14 in the laser-based bar code scanner shown in FIG. 图3的实施例的元件还可以适用于其它类型的逆系统扫描仪。 Example 3 FIG element may also be applicable to other types of inverse scanner system. 在图3的实施例中,条形码扫描仪14包括外壳16、激光源18、第一反射镜20、第二反射镜22、抛物面集光器23、光传感器24、以及在外壳16的一侧中形成的窗口26。 In the embodiment of FIG. 3, the bar code scanner 14 includes a housing 16, a laser source 18, a first mirror 20, second mirror 22, a parabolic collector 23, a light sensor 24, and the side of the housing 16 in the light window 26 is formed.

[0030] 激光源18被配置成发射光束28,其被反射离开第一反射镜20、通过抛物面集光器23中的开口、反射离开第二反射镜22、通过窗口26从外壳16离开、并被投射到条形码30上。 [0030] The laser light source 18 is configured to emit a light beam 28 which is reflected off a first mirror 20, the parabolic light collector through the opening 23, reflected off the second mirror 22, away from the housing 16 through the window 26, and 30 is projected onto the bar code. 可以以从而使得能够跨条形码30扫描光束28的这样的方式来移动反射镜22。 It may thereby enabling such a way across the bar code 30 to scan beam 28 of the movable mirror 22. 光传感器24可以是光电二极管或其它适当的光感测设备,并被配置成检测来自光束28的光,其被反射离开条形码30、第二次反射离开第二反射镜22、并且反射离开抛物面集光器23并被其聚焦。 An optical sensor 24 may be photodiodes or other suitable light sensing device and configured to detect light from the light beam 28 which is reflected off the bar code 30, the second reflected off the second mirror 22 and reflected off the parabolic concentrator 23 and the optical focus it. 在图3中,图示出光传感器24的侧视图。 In Figure 3, illustrates a side view of the optical sensor 24.

[0031] 图4A是图3中所示的光传感器24的前视图。 [0031] FIG. 4A is a front view of the optical sensor 24 shown in FIG 3. 在此传感器布置中,使用单个光传感器24来检测来自条形码30的光反射。 In this sensor arrangement, a single optical sensor 24 detects light reflected from the bar code 30. 光传感器24位于外壳16内以接收源自于激光源18的反射光。 A light sensor 24 positioned to receive the reflected light originating from the laser source 18 within the housing 16.

[0032] 图4B是根据本公开的讲授内容的以另一传感器布置而配置的一组传感器的前视图。 [0032] FIG. 4B is a front view of the present disclosure a set of sensors with another sensor arrangement configured in accordance with the teachings. 图4B的此传感器布置包括设置在条形码读取器14的外壳16内的光传感器24。 4B, the sensor arrangement 24 includes a light sensor disposed within the housing 16 of the bar code reader 14. 在本实施例中,参考传感器32被连接到外壳16并位于外壳16的内部或外面。 In the present embodiment, the reference sensor 32 is connected to the housing 16 and located inside or outside the housing 16. 参考传感器被定位成具有从光传感器24的一定偏移以远离扫描光束反射。 Reference sensor is positioned with an offset from the optical sensor 24 is reflected away from the scanning beam. 然而,参考传感器32足够接近于光传感器24以收集被反射离开附近条形码30的环境光,其然后被反射离开第二反射镜22和抛物面集光器23。 However, the sensor 32 is sufficiently close to the reference sensor 24 to collect the light reflected off the bar code 30 is near the ambient light which is then reflected off the second mirror 22 and the parabolic light collector 23.

[0033] 参考传感器32可邻近于或接近于光传感器24定位,并且可位于光传感器24的任一侧。 [0033] The reference sensor 32 may be positioned adjacent to or near the optical sensor 24, and may be located on either side of the light sensor 24. 参考传感器32可以是类似于光传感器24的光传感器,并且可包括一个或多个光电二极管。 The reference sensor 32 may be a light sensor similar to the light sensor 24, and may include one or more photodiodes. 特别地,在参考传感器32从光传感器24偏移的情况下,参考传感器32被配置成感测来自环境光源的环境光,并感测从条形码30反射的非常少的光(如果有的话)。 In particular, in the case where the reference sensor 32 from the optical sensor 24 shifted, the reference sensor 32 is configured to sense ambient light from the ambient light source and sensing reflected from the bar code 30 is very little light (if any) .

[0034] 图4C是根据本公开的讲授内容的以又一传感器布置配置的另一组传感器的前视图。 [0034] FIG 4C is a front view of the present disclosure another set of sensors to the teachings of yet another configuration of a sensor arrangement. 图4C的传感器布置包括设置在条形码读取器14的外壳16内的光传感器24,如上文所讨论的。 FIG 4C a light sensor arrangement comprises a sensor 16 disposed within the housing 14 of the bar code reader 24, as previously discussed. 另外,在传感器布置中包括第一和第二参考传感器32、34。 Further, including first and second reference sensors 32, 34 in the sensor arrangement. 第一和第二参考传感器32,34被连接到外壳16并可位于外壳16内部或外面。 First and second reference sensors 32, 34 are connected to the housing 16 may be located inside or outside the housing 16. 第一和第二参考传感器32、34被定位成具有从光传感器24的一定偏移以远离扫描光束反射。 First and second reference sensors 32, 34 are positioned with an offset from the optical sensor 24 is reflected away from the scanning beam. 第一和第二参考传感器32、34收集从附近条形码30反射的环境光,其也被反射离开第二反射镜22和抛物面集光器23。 First and second reference sensors 32, 34 are collected from the vicinity of the ambient light reflected from the bar code 30, which is also reflected off the second mirror 22 and the parabolic light collector 23.

[0035] 参考传感器32、34可在光传感器24的相对侧邻近于第一光传感器24定位。 [0035] Reference sensors 32, 34 may be adjacent to the first light sensor 24 positioned on opposite sides of the light sensor 24. 可将参考传感器32、34配置为光传感器,并且每个包括一个或多个光电二极管。 Reference sensors 32, 34 may be configured as a light sensor, and each includes one or more photodiodes. 参考传感器32、34被配置成感测来自不同于激光源18的源的环境光。 Reference sensors 32, 34 are configured to ambient light source 18 different from the source of laser light from the sensing.

[0036] 图5是噪声消除电路36的第一实施例的电路图,其可被包含在基于激光的条形码读取器14的外壳16内。 [0036] FIG. 5 is a circuit diagram of a first embodiment of the noise eliminating circuit 36, which may be contained within the housing 16 of the laser-based bar code reader 14. 可替换地将噪声消除电路36与条形码读取器14分开地设置在处理设备中。 Alternatively, the noise elimination circuit 36 ​​and the bar code reader 14 is provided separately from the processing apparatus. 图5的实施例的噪声消除电路36包括第一光电二极管38、第二光电二极管40、运算放大器46、以及电阻器42、44和48。 Example 5 FIG noise cancellation circuit 36 ​​includes a first photodiode 38 and second photodiode 40, an operational amplifier 46, and resistors 42, 44 and 48. 第一光电二极管38对应于通常被配置成感测从扫描条形码反射的光的光传感器(例如,光传感器24)。 The first photodiode 38 is generally configured to correspond to a light sensor (e.g., an optical sensor 24) senses light reflected from the scanned bar code. 第二光电二极管40对应于根据本公开的讲授内容使用的一个或多个光传感器(例如,参考传感器32、34中的一个或两个)。 The second photodiode 40 corresponds to one or more light sensors using the teachings of the present disclosure (e.g., with reference to one or both of the sensors 32, 34). 第二光电二极管40因此被配置为用以感测环境光的参考。 The second photodiode 40 is configured so as to sense the reference ambient light.

[0037] 运算放大器46被作为差分放大器布置在噪声消除电路36中,以用于从由第一光电二极管38接收的光信号减去由第二光电二极管40接收的光信号。 [0037] The operational amplifier 46 is arranged as a differential amplifier in the noise canceling circuit 36, for subtracting the signal light received by the second photodiode 40 from a first optical signal received by the photodiode 38. 第一光电二极管38不仅接收从条形码反射的光,而且也接收环境光。 First photodiode 38 receives not only the light reflected from the bar code, but also receive ambient light. 第二光电二极管40主要仅接收环境光。 The second photodiode 40 receives only the ambient light mainly. 在Vout处输出的差分信号是被扫描的条形码信号,其中环境光噪声信号被去除。 Differential signal output at Vout signal is a bar code to be scanned, wherein the ambient light noise signal is removed. 可以通过调节放大器46的偏置设置以实现精确的消除来对运算放大器46进行微调。 Of the operational amplifier 46 may be fine-tuned to achieve accurate eliminated by adjusting the bias of the amplifier 46 is provided.

[0038] 图6是根据本实用新型的要扫描的条形码50的视图。 [0038] FIG. 6 is a view according to the present invention to scan the bar code 50. 光束(例如,来自图3的光束28)被作为光斑52指引到条形码50上。 Beam (e.g., from a light beam of 283) as a light spot 52 is directed onto the bar code 50. 光束沿着路径54基本上垂直于条形码50的条移动。 Beam substantially perpendicular to the bar code strip 50 moving along the path 54. 图3和4中所不的光传感器24具有围绕光斑52的相对于条形码50的视场56。 FIGS. 3 and 4 in the optical sensor 24 does not have the phase surrounding the spot 52 with respect to the field of view 50 of the bar code 56. 视场5可包括随着跨条形码50扫描光斑52而移动的条形码50上的基本上矩形或正方形感测区域。 5 may include a bar code field of view substantially rectangular or square in the sensing region 50 across the bar code 50 as the scanning spot 52 moves. 图4B中所示的参考传感器32也具有相对于条形码50的视场58。 Reference sensor shown in FIG. 4B 32 also has a field of view of 58 with respect to the bar code 50. 参考传感器32的视场58保持接近于或邻近于光传感器24的视场56并随着跨条形码50扫描光斑52而移动。 Reference sensor field of view remains close to 32 or 58 adjacent to the field of view of the optical sensor 24 and 56 move with the scanning spot 50 across the bar code 52.

[0039] 两个视场56、58之间的差别是第一视场56包括来自激光源18和来自施加在条形码50上的任何环境光的光反射的视图,而第二视场58包括仅来自施加在条形码50上的环境光的反射的视图。 [0039] The difference between the two fields of view 56, 58 is the first field of view 18 and 56 comprises views from any light reflection of ambient light on the bar code 50 is applied from the laser source, and the second field of view comprises only 58 view of the bar code 50 applied to the reflected light from the ambient. 再次地,当从两个不同视场56、58获得的信号被施加于图5的噪声消除电路36中所示的差分放大器46时,环境光信号被消除并且仅激光信号保留。 Again, when the signals from two different fields of view 56, 58 is applied to obtain the noise cancellation in FIG. 5 of the differential amplifier 36 shown in the circuit 46, the ambient light signal is canceled and only the laser signal remains.

[0040] 图7是根据图4C中所示的传感器布置的条形码50的视图。 [0040] FIG. 7 is a view of a sensor arrangement shown in FIG. 4C barcode 50. 如图6中所示的视场56和58在图7中是相同的,其与图4B和4C的光传感器24和参考传感器32相关联。 Field 56 shown in FIG. 6 and 58 are the same as in FIG. 7, FIG. 4B and 4C of the optical sensor 24 and the reference sensor 32 is associated. 然而,另外,第三传感器(例如,图4C中所示的参考传感器34)具有从视场58的视场56的另一侧的第三视场60。 However, in addition, a third sensor (e.g., reference sensor shown in FIG. 4C 34) having a third field of view 60 field of view from the other side of the field 58 56. 视场56、58以及60分别地对应于光传感器24、第一参考传感器32、以及第二参考传感器34的传感器布置。 The field of view 56, 58 and 60 respectively correspond to the light sensor 24, 32, a second reference sensor and a sensor 34 of the first reference sensor arrangement.

[0041] 视场58和60对应于仅用于感测环境光的传感器。 [0041] The field of view 58 and 60 corresponds to only a sensor for sensing ambient light. 可对环境光信号进行平均或组合以获得表示总环境光信号的单个信号。 Ambient light signal may be averaged or combined to obtain a single signal representing the total ambient light signal. 可以从从视场56获得的信号中减去此总环境光信号以消除环境光噪声分量。 This may be subtracted from the total signal 56 of the ambient light signal is derived from the field of view to eliminate ambient light noise component. 可以使用图5的噪声消除电路36或如下面更详细地解释的其它电路来执行减法过程。 FIG 5 may be used in the noise cancellation circuit 36 ​​or other circuits as will be explained in more detail with subtraction process. 在这方面,可将图5中所示的光电二极管40配置为在图7中所不的视场58、60内接收光的两个光电二极管。 In this respect, the photodiode 540 shown in FIG configured as two photodiode receives light within the field of view in FIG. 7 is not 58, 60.

[0042] 图8是第四传感器布置70的实施例的透视图。 [0042] FIG. 8 is a perspective view of a fourth embodiment of a sensor arrangement 70. 在图8的传感器布置70中,第一光电二极管72和第二光电二极管74被基本上相互垂直地布置。 Sensor 70 is disposed in FIG. 8, a first photodiode 72 and second photodiode 74 are disposed substantially perpendicular to each other. 传感器布置70包括在反射镜76中间具有孔78的反射镜76。 Having a sensor arrangement 70 comprises a hole 78 in the mirror 76 intermediate mirror 76. 反射镜76和孔78可以是基本上矩形的,或者可具有任何其它适当形状。 The mirror 76 and the aperture 78 may be substantially rectangular, or may have any other suitable shape.

[0043] 反射离开条形码50的反射环境光82被指引到反射镜76。 [0043] 50 is reflected off the bar code reflected ambient light 82 is directed to the mirror 76. 反射环境光82中的某些通过孔78福射并被施加在第一光电二极管72上。 Ambient light reflected through the aperture 82 some 78 Four emitted and applied to the first photodiode 72. 同时,反射环境光82中的某些被反射离开反射镜76并被透镜80聚焦到第二光电二极管74上。 Meanwhile, the reflected ambient light 82 certain of the mirror 76 is reflected off the reflective lens 80 and focused onto a second photodiode 74. 另外,也被反射离开条形码50的反射激光84被指引到第一光电二极管72。 Further, the reflected laser light is reflected off a bar code 8450 is directed to the first photodiode 72. 可将孔78配置成使得其基本上允许所有反射激光84通过反射镜76至第一光电二极管72。 Hole 78 may be configured such that it allows substantially all of laser light 84 reflected by a mirror 76 to the first photodiode 72. 如上所述,可将由第一和第二光电二极管72,74获得的两个信号应用于差分放大器(例如,放大器46)以从条形码扫描过程消除环境光的噪声。 As described above, the first and second signals by two photodiodes 72, 74 is applied to obtain the differential amplifier (e.g., amplifier 46) to the noise cancellation of ambient light from the barcode scanning process.

[0044] 图9是根据又一实施例的传感器布置86的视图。 [0044] FIG. 9 is a view of a sensor 86 arranged in accordance with yet another embodiment. 在本实施例中,传感器布置86包括基本上相互垂直地布置的第一光电二极管88和第二光电二极管90,类似于图8的实施例。 In the present embodiment, the sensor arrangement 86 comprises substantially mutually perpendicularly arranged first photodiode 88 and second photodiode 90, Example 8 is similar to FIG. 然而,作为图8中示出的反射镜76的替代,图9的实施例包括插入在激光94的反射光束和环境光96的反射光束的路径中的光谱分光镜(beam splitter) 92。 However, instead of as shown in FIG. 8 of the mirror 76, the embodiment of Figure 9 is inserted in the reflected beam comprises a reflected beam path of the laser 94 and ambient light in the spectral beam splitter 96 (beam splitter) 92.

[0045] 光谱分光镜92被配置成在将环境光96的光束分离的同时使激光94的光束通过。 [0045] The spectral beam splitter 92 is configured to ambient light while the beam splitter 96 of the beam 94 by the laser light. 激光94作为第一光束98通过光谱分光镜92。 A first laser beam 94 as the beam splitter 98 by 92 spectra. 环境光96被相等地分离成通过光谱分光镜92的第二光束100以及被光谱分光镜92反射的第三光束102。 Ambient light 96 is separated equally by spectroscopic dichroic mirror 92 into a second light beam 100 and the third light beam 102 is reflected by the spectral dichroic mirror 92. 第一和第二光束98、100被施加在第一光电二极管88上且第三光束102被施加在第二光电二极管90上。 First and second beams 98 and 100 and the third light beam 102 is applied is applied to the second photodiode 90 on the first photodiode 88. 如上所述,可以将由第一和第二光电二极管88、90接收的信号施加于差分放大器以从由第一和第二光束98、100构成的信号消除来自第三光束102的光信号。 As described above, by the first and second photodiodes 88, the received signal is applied to the differential amplifier to cancel the third light beam 102 from the optical signal from the signal generated by the first and second light beams 98, 100 thereof. 由于分离光束100和102是基本上相同的,所以从差分放大器输出的信号将基本上仅仅等于表示激光反射的第一光束98。 Since the separated beams 100 and 102 are substantially identical, the signal output from the differential amplifier will be substantially equal to only 98 denotes a first laser beam reflected.

[0046] 图10是也在图6和7中示出的条形码50的视图。 [0046] FIG. 10 is a view of FIG. 6 and 7 are also shown in the bar code 50. 在图10中,条形码的视场对应于来自图8的传感器布置70的每个传感器的视场。 In Figure 10, the field of view of the bar code corresponding to the sensor arrangement of FIG. 8 from the field of view of each sensor 70. 来自光束28的光斑52被图8中所示的光电二极管72的视场56围绕。 The light beam spot 52 from the field of view 28 of FIG 8 is shown in the photodiode 72 is about 56. 在图10中还示出周围视场106并且其表示反射离开孔78的所有侧面上的反射镜76并被照射到第二光电二极管74上的光。 In FIG. 10 also shows about 106 and which represents the field of view 76 and is a mirror on the second light is irradiated to the photodiode 74 on all sides of the hole 78 is reflected off. 如所示,在内视场(SP,视场56)和外视场(S卩,视场106)的周界之间可能存在小的空间。 Shown, there is a small space such as between the inner periphery of the field of view (SP, field of view 56) and the field of view (S Jie, field 106) may be. 在此布置中,第二光电二极管74从第一光电二极管72的视场56的所有侧面接收环境光信号。 In this arrangement, the second photodiode 74 receives ambient light signals from all photodiodes of the first side surface 72 of the field of view 56.

[0047] 图11是第二噪声消除电路190的实施例的电路图。 [0047] FIG. 11 is a circuit diagram of a second embodiment of the noise cancellation circuit 190. 虽然可将在本公开中公开的电路中的许多配置成供在逆系统扫描仪中使用,诸如在设计方面类似于图2中所示的激光条形码扫描仪14的激光扫描仪,但是在非逆系统扫描仪中也可使用图11的电路190。 While many circuits can be disclosed in the present disclosure is configured for inverse scanner system used, similar to Figure 2, such as a laser bar code scanner shown in FIG. 14 of the laser scanner in the design, but in the non-inverse the system may also be used in the scanner 11 of the circuit 190 of FIG.

[0048] 图11的噪声消除电路190包括两个运算放大器204和220。 Noise [0048] FIG 11 cancellation circuit 190 comprises two operational amplifiers 204 and 220. 第一运算放大器204在电路190中被配置为用于从一个光信号减去另一个的差分放大器。 A first operational amplifier 204 is configured for subtracting one from a differential amplifier circuit 190 in the optical signal. 第二运算放大器220在电路190中被配置为用于提供非反相放大信号的负反馈放大器。 The second operational amplifier 220 in the circuit 190 is configured to provide negative feedback to the non-inverting amplifier for amplifying a signal.

[0049] 噪声消除电路190还包括电阻器196、206、212、218、222以及226和电容器192、194、208、210、214、216、224以及228。 [0049] The noise elimination circuit 190, and further includes a resistor 226 and a capacitor 192,194,208,210,214,216,224 196,206,212,218,222 and 228. 噪声消除电路190还包括配置有激光滤光镜200的第一光电二极管198和第二光电二极管202。 Noise cancellation circuit 190 further comprises a filter configured with a laser diode 200 first photodiode and the second photodiode 198 202. 具有激光滤光镜200的第一光电二极管198接收具有包括被滤出的激光的频带的光信号。 Having a first photo diode 198 receives the optical signal having been filtered out of the laser comprises a frequency band filter 200 is a laser. 因此,第一光电二极管198获得除激光频率的频带之外的光的基本上所有频率。 Therefore, the first photodiode 198 is obtained substantially all light frequencies except the frequency band of the laser frequency. 第二光电二极管202正常地接收光,包括激光频率和在激光频率的范围外面的频率。 The second photodiode 202 is normally receiving light, comprising a laser and a frequency outside the frequency range of the laser frequency. 用两组信号,可以从由第二光电二极管202接收的光信号消除来自第一光电二极管198的环境噪声频率。 With two groups of signals, the frequency of ambient noise can be eliminated from the first photodiode 198 from the light signal received by the second photo diode 202.

[0050] 上文描述的图5 —11针对其中利用至少两个光传感器或光电二极管来获得用于从环境光中减去噪声信号的差分信号的实施例。 [0050] FIG described above in Example 5-11 to obtain a difference signal by subtracting the noise signal from the ambient light for which the at least two light sensors or by using a photodiode. 相对于以下描述,描述了针对利用一个光传感器的激光扫描仪的实施例。 With respect to the following description describes embodiments using a light sensor for laser scanner. 例如,下面描述的噪声消除过程可利用图3和4A中所示的单个光传感器24。 For example, a noise cancellation process described below may utilize a single optical sensor 24 shown in FIGS. 3 and 4A.

[0051] 图12是根据利用一个光电二极管的实施例的噪声消除电路110的电路图。 [0051] FIG. 12 is a circuit diagram according to the noise cancellation circuit 110 with one embodiment of the photodiode. 图12的噪声消除电路110包括可见光激光二极管112、光电二极管114、电阻器116、晶体管117、反相器(inverter) 118、开关120、122,延迟线电路124、相移电路126、电阻器128、130、134以及运算放大器132。 Circuit 110 of FIG. 12 noise cancellation comprises visible laser diode 112, a photodiode 114, resistor 116, transistor 117, an inverter (inverter) 118, switches 120, 122, delay circuit 124, the phase shift circuit 126, a resistor 128 , 130, 134 and an operational amplifier 132. 可将可见光激光二极管112配置为用于条形码读取器的激光源,诸如图3中所示的激光源18。 Visible laser diode 112 may be configured as a bar code reader to a laser source, such as a laser light source 18 shown in FIG. 3.

[0052] 在操作中,向输入Vin施加低输入信号,其继而被施加到晶体管117的基极或栅极,从而使可见光激光二极管112关掉。 [0052] In operation, an input applied to the input signal Vin is low, which in turn is applied to the base or gate of the transistor 117, so that the visible laser diode 112 to turn off. 因此,光电二极管114仅从环境光源接收光。 Thus, the photodiode 114 receives light only from the ambient light source. 低Vin信号被反相器118反相成高信号,其从而使开关120闭合。 Low signal Vin is inverted by inverter 118 to a high signal, so that the switch 120 is closed. 当开关120被闭合时,来自光电二极管114的信号被提供到延迟线电路124,其使信号延迟直至操作的下一级为止。 When the switch 120 is closed, the signal from the photodiode 114 is supplied to a delay circuit 124 which delays the signal until the next one up operation. 此信号在本文中称为暗场信号,指定激光或可见光激光二极管112关闭的时间。 This signal is referred to herein as dark field signal, laser or visible laser diode designated 112 off time.

[0053] 在操作的下一级期间,Vin信号为高,其使可见光激光二极管112打开。 [0053] During operation of the next stage, the signal Vin is high, which causes visible laser diode 112 is opened. 在这种情况下,光电二极管114接收来自环境源的光加来自可见光激光二极管112的光两者。 In this case, both of the photodiode 114 receives light from the environment from a source plus visible laser diode 112. 高Vin信号使开关122闭合,从而将来自光电二极管114的组合光信号施加到相移电路126,其使信号的相位移位以与延迟信号匹配。 High signal Vin the switch 122 is closed, so that the combined optical signal from the photodiode 114 is applied to the phase shifter circuit 126 which shifts the phase of the signal with the delay signal match. 这里,相移信号(即,包括组合光信号)被施加到差分放大器132的正输入,并且延迟信号(即,暗场信号)被施加到差分放大器132的负输入。 Here, the phase shifted signal (i.e., including a combination of a light signal) is applied to the positive input of the differential amplifier 132, and the delayed signal (i.e., dark-field signal) is applied to the negative input of the differential amplifier 132. 差分放大器132的输出(即,Vout)是激光信号,其中环境噪声分量被消除。 Output (i.e., Vout of) the differential amplifier 132 is a laser signal, wherein the ambient noise component is eliminated.

[0054] 根据暗场噪声消除电路的另一实施例,可用模数转换器和用于存储暗场信号的数字存储器件来替换图12中所示的延迟线电路124。 [0054] According to another embodiment the noise cancellation circuit in a dark field, the available analog to digital converter and a digital memory device for storing signals to replace the dark-field delay circuit 124 shown in FIG. 12. 在这种情况下相移电路126可能是不必要的。 In this case, the lower phase-shift circuit 126 may be unnecessary. 可将包括激光分量和环境光分量两者的第二光信号施加到差分放大器132的正输入,并且可以将存储的暗场信号在数模转换之后施加到差分放大器132的负输入。 It may include a second optical signal both the laser component and the ambient light component is applied to the positive input of the differential amplifier 132, and stored in the dark field signal can be applied to the negative input of the differential amplifier 132 after digital to analog conversion. 从第二信号减去环境噪声的延迟或存储信号分量以获得噪声消除激光信号。 Or stored signals from the delay component of the second signal minus the ambient noise to obtain a noise cancellation signal laser.

[0055] 图13是根据本实用新型的讲授内容的根据利用一个光电二极管的第二实施例的噪声消除电路140的电路图。 [0055] FIG. 13 is a circuit diagram according to a second embodiment of the noise elimination using a photodiode of the present invention circuit 140 of the teachings. 图13的噪声消除电路140包括电阻器142、可见光激光二极管144、光电二极管146、晶体管147、反相器148、采样和保持电路150、152、电阻器154、156、160以及运算放大器158。 Noise cancellation circuit 140 in FIG. 13 comprises a resistor 142, a visible laser diode 144, a photodiode 146, a transistor 147, an inverter 148, a sample and hold circuit 150, a resistor 158 and an operational amplifier 154,156,160. 再次地,可将可见光激光二极管144配置为图3中所示的激光源18。 Again, visible laser diode 144 may be configured as a laser light source 18 shown in FIG.

[0056] 噪声消除电路140的操作涉及到向输入Vin施加高频调制信号。 [0056] The operation of the noise cancellation circuit 140 is directed to a high-frequency modulation signal is applied to the input Vin. 调制信号引起晶体管147调制可见光激光二极管144以便以特定调制频率照亮光电二极管146。 Modulated modulation signal causes transistor 147 to illuminate the visible laser diode 144 to the photodiode 146 at a particular modulation frequency. 为了减少附加噪声,调制频率比激光扫描信号和环境闪烁噪声信号两者的频率高得多。 For additional noise reduction, both the frequency of the modulation frequency flicker noise signal than the laser scanning and the signal environment is much higher. 例如,调制频率可为最高条形码扫描频率的频率的至少三倍。 For example, the modulation frequency may be at least three times the maximum frequency of the bar code scanning frequency.

[0057] 当调制信号为低时,可见光激光二极管144关闭,并且第一采样和保持电路150被其中以从光电二极管146接收信号,其仅包括环境光。 [0057] When the modulation signal is low, visible laser diode 144 is closed and the first sample and hold circuit 150 which are to receive signals from the photodiode 146, which includes only the ambient light. 当调制信号为高时,可见光激光二极管144点亮,并且第二采样和保持电路152被启用以从光电二极管146接收信号,其包括激光和环境光两者。 When the modulation signal is high, visible laser diode 144 is lit, and a second sample and hold circuit 152 is enabled to receive a signal from the photodiode 146, which includes both a laser and ambient light. 图13的噪声消除电路140还可包括具有采样和保持电路150、152的信号延迟线,并且可使用同步前置放大器来将采样和保持电路150、152的输出组合以用于使差分放大器158的输入处的单独的信号同步。 Noise cancellation circuit 140 in FIG. 13 may further include a sample and hold signal delay circuit 150, 152, and may be used to synchronize the preamplifier sample and hold circuits 150, 152 to the combined output of the differential amplifier 158 for separate synchronizing signal at the input. 差分放大器158减掉环境光分量,并且仅输出激光分量。 The differential amplifier 158 minus the ambient light components, and only the output of the laser component.

[0058] 图14是根据利用一个光电二极管的另一实施例的噪声消除电路170的电路图。 [0058] FIG. 14 is a circuit diagram of the embodiment of the noise eliminating circuit 170 using a photodiode according to another embodiment. 在图14中,噪声消除电路170包括光电二极管172、电阻器174、运算放大器176、电阻器178、陷波滤波器180、以及频率匹配电路182。 In FIG 14, noise cancellation circuit 170 includes a photodiode 172, a resistor 174, an operational amplifier 176, a resistor 178, a notch filter 180, and a frequency matching circuit 182. 噪声消除电路170是用于用具有窄带宽的陷波滤波器180对噪声分量进行滤波的有源滤波器电路。 An active noise cancellation circuit 170 is a filter circuit for filtering the noise component at 180 having a narrow bandwidth notch filter is used. 可以基于环境光的闪烁噪声的频率和激光条形码扫描元件的频率来选择滤波频率。 Filter frequency may be selected based on frequency and laser bar code scanning element flicker noise of the ambient light. 在某些实施例中,可以使用超过一个频率滤波器,特别是如果环境光引入闪烁照明的超过一个频率的话。 In certain embodiments, more than one frequency filter may be used, especially if the ambient light into the illumination flicker frequency is more than one word. 替换地,可以使用无源滤波电路来降低噪声消除电路170的成本。 Alternatively, a passive filter circuit may be used to reduce the cost of the noise cancellation circuit 170.

[0059] 根据本公开的讲授内容,可将其它电路用于噪声消除。 [0059] According to the teachings of the present disclosure, other circuits may be used to eliminate noise. 在另一示例中,可以使用跳频技术(frequency hopping technique),其中激光源(例如,激光源18)通过不同频率的任意模式(pattern)来操作,使得一个频率下的噪声可仅影响激光扫描过程的小的无关紧要的部分。 In another example, frequency hopping may be used (frequency hopping technique), wherein the laser source (e.g., laser light source 18) is operated by any of the modes of different frequencies (pattern), so that the noise at one frequency only affects the laser scanning small insignificant part of the process. 并且,可使用相移技术来解决现有技术的解码问题。 Further, the phase-shift technique can be used to solve the problems of the prior art decoder. 将跳频和相移电路与诸如滤波和消除之类的其它噪声消除电路组合可以进一步改善闪烁干扰下的激光扫描仪解码性能。 The frequency hopping and other noise and the phase shift circuit such as filtering and elimination of such cancellation circuit assembly can be further improved decoding performance laser scanner flicker disturbance.

[0060] 因此,可以对当前激光条形码扫描仪进行修改以包括环境噪声消除功能以改善解码性能。 [0060] Thus, the environment may be modified to include a noise canceling function to improve decoding performance for the current laser bar code scanner. 修改可以包括向现有电路添加参考光电二极管或添加噪声消除电路。 Modification may include adding a reference to the conventional photodiode noise canceling circuit or addition circuit. 可以用定制的光学部件以及ASIC设计和开发来实现更高级的解决方案。 You can use custom optical components and ASIC design and development to more advanced solutions.

[0061] 为了补充本公开,本申请通过引用而整体地结合了以下共同转让专利、专利申请公开、和专利申请: [0061] In order to supplement the present disclosure, the present application incorporated by reference in its entirety following commonly assigned patents, patent application publications, and patent applications:

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[0278] 美国专利申请公开号2014/0374483; [0278] U.S. Patent Application Publication No. 2014/0374483;

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[0280] 美国专利申请公开号2015/0001301; [0280] U.S. Patent Application Publication No. 2015/0001301;

[0281] 美国专利申请公开号2015/0001304; [0281] U.S. Patent Application Publication No. 2015/0001304;

[0282] 美国专利申请公开号2015/0003673; [0282] U.S. Patent Application Publication No. 2015/0003673;

[0283] 美国专利申请公开号2015/0009338; [0283] U.S. Patent Application Publication No. 2015/0009338;

[0284] 美国专利申请公开号2015/0009610; [0284] U.S. Patent Application Publication No. 2015/0009610;

[0285] 美国专利申请公开号2015/0014416; [0285] U.S. Patent Application Publication No. 2015/0014416;

[0286] 美国专利申请公开号2015/0021397; [0286] U.S. Patent Application Publication No. 2015/0021397;

[0287] 美国专利申请公开号2015/0028102; [0287] U.S. Patent Application Publication No. 2015/0028102;

[0288] 美国专利申请公开号2015/0028103; [0288] U.S. Patent Application Publication No. 2015/0028103;

[0289] 美国专利申请公开号2015/0028104; [0289] U.S. Patent Application Publication No. 2015/0028104;

[0290] 美国专利申请公开号2015/0029002; [0290] U.S. Patent Application Publication No. 2015/0029002;

[0291] 美国专利申请公开号2015/0032709; [0291] U.S. Patent Application Publication No. 2015/0032709;

[0292] 美国专利申请公开号2015/0039309; [0292] U.S. Patent Application Publication No. 2015/0039309;

[0293] 美国专利申请公开号2015/0039878; [0293] U.S. Patent Application Publication No. 2015/0039878;

[0294] 美国专利申请公开号2015/0040378; [0294] U.S. Patent Application Publication No. 2015/0040378;

[0295] 美国专利申请公开号2015/0048168; [0295] U.S. Patent Application Publication No. 2015/0048168;

[0296] 美国专利申请公开号2015/0049347; [0296] U.S. Patent Application Publication No. 2015/0049347;

[0297] 美国专利申请公开号2015/0051992; [0297] U.S. Patent Application Publication No. 2015/0051992;

[0298] 美国专利申请公开号2015/0053766; [0298] U.S. Patent Application Publication No. 2015/0053766;

[0299] 美国专利申请公开号2015/0053768; [0299] U.S. Patent Application Publication No. 2015/0053768;

[0300] 美国专利申请公开号2015/0053769; [0300] U.S. Patent Application Publication No. 2015/0053769;

[0301] 美国专利申请公开号2015/0060544; [0301] U.S. Patent Application Publication No. 2015/0060544;

[0302] 美国专利申请公开号2015/0062366; [0302] U.S. Patent Application Publication No. 2015/0062366;

[0303] 美国专利申请公开号2015/0063215; [0303] U.S. Patent Application Publication No. 2015/0063215;

[0304] 美国专利申请公开号2015/0063676; [0304] U.S. Patent Application Publication No. 2015/0063676;

[0305] 美国专利申请公开号2015/0069130; [0305] U.S. Patent Application Publication No. 2015/0069130;

[0306] 美国专利申请公开号2015/0071819; [0306] U.S. Patent Application Publication No. 2015/0071819;

[0307] 美国专利申请公开号2015/0083800; [0307] U.S. Patent Application Publication No. 2015/0083800;

[0308] 美国专利申请公开号2015/0086114; [0308] U.S. Patent Application Publication No. 2015/0086114;

[0309] 美国专利申请公开号2015/0088522; [0309] U.S. Patent Application Publication No. 2015/0088522;

[0310] 美国专利申请公开号2015/0096872; [0310] U.S. Patent Application Publication No. 2015/0096872;

[0311] 美国专利申请公开号2015/0099557; [0311] U.S. Patent Application Publication No. 2015/0099557;

[0312] 美国专利申请公开号2015/0100196; [0312] U.S. Patent Application Publication No. 2015/0100196;

[0313] 美国专利申请公开号2015/0102109; [0313] U.S. Patent Application Publication No. 2015/0102109;

[0314] 美国专利申请公开号2015/0115035; [0314] U.S. Patent Application Publication No. 2015/0115035;

[0315] 美国专利申请公开号2015/0127791; [0315] U.S. Patent Application Publication No. 2015/0127791;

[0316] 美国专利申请公开号2015/0128116; [0316] U.S. Patent Application Publication No. 2015/0128116;

[0317] 美国专利申请公开号2015/0129659; [0317] U.S. Patent Application Publication No. 2015/0129659;

[0318] 美国专利申请公开号2015/0133047; [0318] U.S. Patent Application Publication No. 2015/0133047;

[0319] 美国专利申请公开号2015/0134470; [0319] U.S. Patent Application Publication No. 2015/0134470;

[0320] 美国专利申请公开号2015/0136851; [0320] U.S. Patent Application Publication No. 2015/0136851;

[0321] 美国专利申请公开号2015/0136854; [0321] U.S. Patent Application Publication No. 2015/0136854;

[0322] 美国专利申请公开号2015/0142492; [0322] U.S. Patent Application Publication No. 2015/0142492;

[0323] 美国专利申请公开号2015/0144692; [0323] U.S. Patent Application Publication No. 2015/0144692;

[0324] 美国专利申请公开号2015/0144698; [0324] U.S. Patent Application Publication No. 2015/0144698;

[0325] 美国专利申请公开号2015/0144701; [0325] U.S. Patent Application Publication No. 2015/0144701;

[0326] 美国专利申请公开号2015/0149946; [0326] U.S. Patent Application Publication No. 2015/0149946;

[0327] 美国专利申请公开号2015/0161429; [0327] U.S. Patent Application Publication No. 2015/0161429;

[0328] 美国专利申请公开号2015/0169925; [0328] U.S. Patent Application Publication No. 2015/0169925;

[0329] 美国专利申请公开号2015/0169929; [0329] U.S. Patent Application Publication No. 2015/0169929;

[0330] 美国专利申请公开号2015/0178523; [0330] U.S. Patent Application Publication No. 2015/0178523;

[0331] 美国专利申请公开号2015/0178534; [0331] U.S. Patent Application Publication No. 2015/0178534;

[0332] 美国专利申请公开号2015/0178535; [0332] U.S. Patent Application Publication No. 2015/0178535;

[0333] 美国专利申请公开号2015/0178536; [0333] U.S. Patent Application Publication No. 2015/0178536;

[0334] 美国专利申请公开号2015/0178537; [0334] U.S. Patent Application Publication No. 2015/0178537;

[0335] 美国专利申请公开号2015/0181093; [0335] U.S. Patent Application Publication No. 2015/0181093;

[0336] 美国专利申请公开号2015/0181109; [0336] U.S. Patent Application Publication No. 2015/0181109;

[0337] 2012年2月7 日提交的用于Laser Scanning Module Employing an ElastomericU-Hinge Based Laser Scanning Assembly 的美国专利申请号13 / 367,978 (Feng 等人); US Patent Application No. for Laser Scanning Module Employing an ElastomericU-Hinge Based Laser Scanning Assembly of the [0337] February 7, 2012, filed 13 / 367,978 (Feng et al.);

[0338] 2013年6月19日提交的用于Electronic Device的美国专利申请号29 /458,405 (Fitch 等人); [0338] June 19, 2013 filed US Patent for Electronic Device Application No. 29 / 458,405 (Fitch et al.);

[0339] 2013年7月2日提交的用于Electronic Device Enclosure的美国专利申请号29/459,620 (London 等人); [0339] July 2, 2013 filed a US Patent for Electronic Device Enclosure Application No. 29 / 459,620 (London et al.);

[0340] 2013年9月26日提交的用于Electronic Device Case的美国专利申请号29 /468, 118 (Oberpriller 等人); [0340] September 26, 2013, filed for Electronic Device Case U.S. Patent Application No. 29/468, 118 (Oberpriller et al.);

[0341] 2014 年1 月8 提交的用于Indicia-reader Having Unitary Construct1nScanner的美国专利申请号14 / 150, 393 (Colavito等人); [0341] U.S. Patent No. January 2014, filed for 8 Indicia-reader Having Unitary Construct1nScanner Application No. 14/150, 393 (Colavito et al.);

[0342] 2014 年3 月7 日提交的用于Indicia Reader for Size-Limited Applicat1ns的美国专利申请号14 / 200, 405 (Feng等人); [0342] March 7, 2014 filed US patent for Indicia Reader for Size-Limited Applicat1ns Application No. 14/200, 405 (Feng et al.);

[0343] 2014 年4 月1 日提交的用于Hand - Mounted Indicia - Reading Device withFinger Mot1n Triggering 的美国专利申请号14 / 231,898 (Van Horn 等人); [0343] 1 April 2014 filed for Hand - Mounted Indicia - US Patent Reading Device withFinger Mot1n Triggering Application No. 14 / 231,898 (Van Horn et al.);

[0344] 2014年4月2日提交的用于Imaging Terminal的美国专利申请号29/486,759(Oberpriller 等人); [0344] April 2, 2014 filed US patent for Imaging Terminal Application No. 29 / 486,759 (Oberpriller et al.);

[0345] 2014 年4 月21 日提交的用于Docking System and Method Using Near FieldCommunicat1n 的美国专利申请号14 / 257,364 (Showering); [0345] April 21, 2014 U.S. Patent No., filed for Docking System and Method Using Near FieldCommunicat1n Application No. 14 / 257,364 (Showering);

[0346] 2014 年4 月29 日提交的用于Autofocus Lens System for Indicia Readers 的美国专利申请号14 / 264,173 (Ackley等人); US Patent Application No. for Autofocus Lens System for Indicia Readers of [0346] April 29, 2014, filed 14 / 264,173 (Ackley et al.);

[0347] 2014年5月14日提交的用于MULTIPURPOSE OPTICAL READER的美国专利申请号14 / 277, 337 (Jovanovski 等人); US Patent Application No. 14/277, 337 (Jovanovski, et al.) MULTIPURPOSE OPTICAL READER for the [0347] May 14, 2014 filed;

[0348] 2014 年5 月21 日提交的用于TERMINAL HAVING ILLUMINAT1N AND FOCUSCONTROL的美国专利申请号14 / 283,282 (Liu等人); [0348] 2014 for TERMINAL HAVING ILLUMINAT1N AND FOCUSCONTROL US Patent Application No. 21 May filed 14 / 283,282 (Liu et al.);

[0349] 2014 年7 月10 日提交的用于MOBILE - PHONE ADAPTER FOR ELECTRONICTRANSACT1NS 的美国专利申请号14 / 327,827 (Hejl); [0349] July 10, 2014, filed for MOBILE - PHONE ADAPTER FOR ELECTRONICTRANSACT1NS US Patent Application Serial No. 14 / 327,827 (Hejl);

[0350] 2014 年7 月18 日提交的用于SYSTEM AND METHOD FOR INDICIA VERIFICAT1N 的美国专利申请号14 / 334, 934 (Hejl); US Patent Application No. for SYSTEM AND METHOD FOR INDICIA VERIFICAT1N the [0350] July 18, 2014, filed 14/334, 934 (Hejl);

[0351] 2014 年7 月24 日提交的用于LASER SCANNING CODE SYMBOL READING SYSTEM 的美国专利申请号14 / 339, 708 (Xian等人); US Patent Application No. for LASER SCANNING CODE SYMBOL READING SYSTEM of [0351] July 24, 2014, filed 14/339, 708 (Xian et al.);

[0352] 2014 年7 月25 日提交的用于AXIALLY REINFORCED FLEXIBLE SCAN ELEMENT 的美国专利申请号14 / 340, 627 (Rueblinger等人); [0352] July 25, 2014 U.S. Patent No., filed for AXIALLY REINFORCED FLEXIBLE SCAN ELEMENT Application No. 14/340, 627 (Rueblinger et al.);

[0353] 2014 年7 月30 日提交的用于MULTIFUNCT1N POINT OF SALE APPARATUS WITHOPTICAL SIGNATURE CAPTURE 的美国专利申请号14 / 446,391 (Good 等人); [0353] July 30, 2014 filed US patent for MULTIFUNCT1N POINT OF SALE APPARATUS WITHOPTICAL SIGNATURE CAPTURE Application No. 14 / 446,391 (Good et al.);

[0354] 2014年8月6日提交的用于INTERACTIVE INDICIA READER的美国专利申请号14/ 452,697 (Todeschini); US Patent Application No. INTERACTIVE INDICIA READER for the [0354] August 6, 2014, filed 14 / 452,697 (Todeschini);

[0355] 2014 年8 月6 日提交的用于DMENS1NING SYSTEM WITH ⑶IDED ALIGNMENT 的美国专利申请号14 / 453,019 (Li等人); US Patent Application No. DMENS1NING SYSTEM WITH ⑶IDED ALIGNMENT for the [0355] August 6, 2014, filed 14 / 453,019 (Li et al.);

[0356] 2014 年8 月19 日提交的用于MOBILE COMPUTING DEVICE WITH DATA COGNIT1NSOFTWARE 的美国专利申请号14 / 462,801 (Todeschini 等人); US patent application number is used MOBILE COMPUTING DEVICE WITH DATA COGNIT1NSOFTWARE of [0356] August 19, 2014, filed 14 / 462,801 (Todeschini et al.);

[0357] 2014 年9 月10 日提交的用于VARIABLE DEPTH OF FIELD BARCODE SCANNER 的美国专利申请号14 / 483,056 (McCloskey等人); [0357] September 10, 2014 filed US patent for VARIABLE DEPTH OF FIELD BARCODE SCANNER Application No. 14 / 483,056 (McCloskey et al.);

[0358] 2014 年10 月14 日提交的用于IDENTIFYING INVENTORY ITEMS IN A STORAGEFACILITY的美国专利申请号14 / 513,808 (Singel等人); U.S. Patent Application No. for IDENTIFYING INVENTORY ITEMS IN A STORAGEFACILITY the [0358] October 14, 2014, filed 14 / 513,808 (Singel et al.);

[0359] 2014 年10 月21 日提交的用于HANDHELD DIMENS1NING SYSTEM WITH FEEDBACK的美国专利申请号14 / 519,195 (Laffargue等人); US Patent Application No. HANDHELD DIMENS1NING SYSTEM WITH FEEDBACK for the [0359] October 21, 2014, filed 14 / 519,195 (Laffargue et al.);

[0360] 2014 年10 月21 日提交的用于D頂ENS1NING SYSTEM WITH MULTIPATHINTERFERENCE MITIGAT1N 的美国专利申请号14 / 519,179 (Thuries 等人); [0360] October 21, 2014, filed for U.S. Patent No. D top ENS1NING SYSTEM WITH MULTIPATHINTERFERENCE MITIGAT1N Application No. 14 / 519,179 (Thuries et al.);

[0361] 2014 年10 月21 日提交的用于SYSTEM AND METHOD FOR DIMENS1NING 的美国专利申请号14 / 519,211 (Ackley 等人); US Patent Application No. SYSTEM AND METHOD FOR DIMENS1NING for the [0361] October 21, 2014, filed 14 / 519,211 (Ackley et al.);

[0362] 2014 年10 月21 日提交的用于HANDHELD DIMENS10NER WITH DATA - QUALITYINDICAT1N 的美国专利申请号14 / 519,233 (Laffargue 等人); [0362] October 21, 2014, filed for HANDHELD DIMENS10NER WITH DATA - QUALITYINDICAT1N US Patent Application No. 14 / 519,233 (Laffargue et al.);

[0363] 2014 年10 月21 日提交的用于HANDHELD DIMENS1NING SYSTEM WITHMEASUREMENT - CONFORMANCE FEEDBACK 的美国专利申请号14 / 519,249 (Ackley 等人); [0363] October 21, 2014, filed for HANDHELD DIMENS1NING SYSTEM WITHMEASUREMENT - CONFORMANCE FEEDBACK US Patent Application Serial No. 14 / 519,249 (Ackley et al.);

[0364] 2014 年10 月29 日提交的用于METHOD AND SYSTEM FOR RECOGNIZING SPEECHUSING WILDCARDS IN AN EXPECTED RESPONSE 的美国专利申请号14 / 527,191 (Braho 等人); [0364] October 29, 2014 filed US patent for METHOD AND SYSTEM FOR RECOGNIZING SPEECHUSING WILDCARDS IN AN EXPECTED RESPONSE Application No. 14 / 527,191 (Braho et al.);

[0365] 2014 年10 月31 日提交的用于ADAPTABLE INTERFACE FOR A MOBILE COMPUTINGDEVICE的美国专利申请号14 / 529, 563 (Schoon等人); [0365] October 31, 2014, filed for ADAPTABLE INTERFACE FOR A MOBILE COMPUTINGDEVICE U.S. Patent Application No. 14/529, 563 (Schoon et al.);

[0366] 2014 年10 月31 日提交的用于BARCODE READER WITH SECURITY FEATURES 的美国专利申请号14 / 529,857 (Todeschini 等人); [0366] October 31, 2014 filed US patent for BARCODE READER WITH SECURITY FEATURES Application No. 14 / 529,857 (Todeschini et al.);

[0367] 2014年11 月3 日提交的用于PORTABLE ELECTRONIC DEVICES HAVING A SEPARATELOCAT1N TRIGGER UNIT FOR USE IN CONTROLLING AN APPLICAT1N UNIT 的美国专利申请号14/398,542 (Bian 等人); U.S. Patent Application No. for PORTABLE ELECTRONIC DEVICES HAVING A SEPARATELOCAT1N TRIGGER UNIT FOR USE IN CONTROLLING AN APPLICAT1N UNIT of [0367] 3 November 2014, filed 14 / 398,542 (Bian et al.);

[0368] 2014 年11 月3 日提交的用于DIRECTING AN INSPECTOR THROUGH AN INSPECT1N的美国专利申请号14 / 531,154 (Miller等人); US patent application number is used DIRECTING AN INSPECTOR THROUGH AN INSPECT1N of [0368] November 3, 2014, filed 14 / 531,154 (Miller et al.);

[0369] 2014年11 月5 日提交的用于BARCODE SCANNING SYSTEM USING WEARABLE DEVICEWITH EMBEDDED CAMERA 的美国专利申请号14 / 533,319 (Todeschini); [0369] November 5, 2014 filed US patent for BARCODE SCANNING SYSTEM USING WEARABLE DEVICEWITH EMBEDDED CAMERA Application No. 14 / 533,319 (Todeschini);

[0370] 2014 年11 月7 日提交的用于CONCATENATED EXPECTED RESPONSES FOR SPEECHRECOGNIT1N的美国专利申请号14 / 535,764 (Braho等人); US Patent Application No. CONCATENATED EXPECTED RESPONSES FOR SPEECHRECOGNIT1N for the [0370] November 7, 2014, filed 14 / 535,764 (Braho et al.);

[0371] 2014 年12 月12 日提交的用于AUTO - CONTRAST VIEWFINDER FOR AN INDICIAREADER 的美国专利申请号14 / 568,305 (Todeschini); [0371] December 12, 2014 filed for AUTO - US Patent CONTRAST VIEWFINDER FOR AN INDICIAREADER Application No. 14 / 568,305 (Todeschini);

[0372] 2014 年12 月17 日提交的用于DYNAMIC DIAGNOSTIC INDICATOR GENERAT1N 的美国专利申请号14 / 573,022 (Goldsmith); [0372] US Patent Application No. 2014 for DYNAMIC DIAGNOSTIC INDICATOR GENERAT1N of December 17, filed 14 / 573,022 (Goldsmith);

[0373] 2014年12月22提交的用于SAFETY SYSTEM AND METHOD的美国专利申请号14 /578,627 (Ackley 等人); [0373] filed on December 22, 2014 U.S. Pat for SAFETY SYSTEM AND METHOD Application No. 14 / 578,627 (Ackley et al.);

[0374] 2014 年12 月23 日提交的用于MEDIA GATE FOR THERMAL TRANSFER PRINTERS 的美国专利申请号14 / 580,262 (Bowles); U.S. Patent Application No. for MEDIA GATE FOR THERMAL TRANSFER PRINTERS of [0374] 23 December 2014, filed 14 / 580,262 (Bowles);

[0375] 2015 年1 月6 日提交的用于SHELVING AND PACKAGE LOCATING SYSTEMS FORDELIVERY VEHICLES 的美国专利申请号14 / 590,024 (Payne); [0375] January 6, 2015 filed a US patent for SHELVING AND PACKAGE LOCATING SYSTEMS FORDELIVERY VEHICLES Application No. 14 / 590,024 (Payne);

[0376] 2015 年1 月14 日提交的用于SYSTEM AND METHOD FOR DETECTING BARCODEPRINTING ERRORS 的美国专利申请号14 / 596,757 (Ackley 等人); [0376] for SYSTEM AND METHOD FOR DETECTING BARCODEPRINTING ERRORS US Patent Application No. 14 January 2015, filed 14 / 596,757 (Ackley et al.);

[0377] 2015 年1 月21 日提交的用于OPTICAL READING APPARATUS HAVING VARIABLESETTINGS的美国专利申请号14 / 416,147 (Chen等人); [0377] US patent application number for OPTICAL READING APPARATUS HAVING VARIABLESETTINGS of January 21, 2015, filed 14 / 416,147 (Chen et al.);

[0378] 2015 年2 月5 日提交的用于DEVICE FOR SUPPORTING AN ELECTRONIC TOOL ON AUSER ' S HAND 的美国专利申请号14 / 614, 706 (Oberpriller 等人) [0378] 5 February 2015, filed for DEVICE FOR SUPPORTING AN ELECTRONIC TOOL ON AUSER 'S HAND U.S. Patent Application No. 14/614, 706 (Oberpriller et al.)

[0379] 2015年2月5日提交的用于CARGO APPORT1NMENT TECHNIQUES的美国专利申请号14 / 614, 796 (Morton 等人); [0379] February 5, 2015 filed US patent for CARGO APPORT1NMENT TECHNIQUES Application No. 14/614, 796 (Morton et al.);

[0380] 2015年2月6日提交的用于TABLE COMPUTER的美国专利申请号29 / 516,892(Bidwell 等人); [0380] February 6, 2015 filed US patent application for TABLE COMPUTER No. 29 / 516,892 (Bidwell et al.);

[0381] 2015 年2 月11 日提交的用于METHODS FOR TRAINING A SPEECH RECOGNIT1NSYSTEM 的美国专利申请号14 / 619,093 (Pecorari); [0381] February 11, 2015, filed for U.S. Patent METHODS FOR TRAINING A SPEECH RECOGNIT1NSYSTEM Application No. 14 / 619,093 (Pecorari);

[0382] 2015 年2 月23 日提交的用于DEVICE, SYSTEM, AND METHOD FOR DETERMININGTHE STATUS OF CHECKOUT LANES 的美国专利申请号14 / 628,708 (Todeschini); [0382] February 23, 2015, filed for DEVICE, SYSTEM, US Patent AND METHOD FOR DETERMININGTHE STATUS OF CHECKOUT LANES Application No. 14 / 628,708 (Todeschini);

[0383] 2015 年2 月25 日提交的用于TERMINAL INCLUDING IMAGING ASSEMBLY 的美国专利申请号14 / 630, 841 (Gomez等人); [0383] February 25, 2015 filed US patent for TERMINAL INCLUDING IMAGING ASSEMBLY Application No. 14/630, 841 (Gomez et al.);

[0384] 2015 年3 月2 日提交的用于SYSTEM AND METHOD FOR RELIABLE STORE - AND -FORWARD DATA HANDLING BY ENCODED INFORMAT1N READING TERMINALS 的美国专利申请号14 / 635,346 (Sevier); For SYSTEM AND METHOD FOR RELIABLE STORE [0384] 2015 filed May 2 years. 3 is - AND -FORWARD DATA HANDLING BY ENCODED INFORMAT1N READING TERMINALS U.S. Patent Application No. 14 / 635,346 (Sevier);

[0385] 2015年3月2日提交的用于SCANNER的美国专利申请号29 / 519,017 (Zhou等人); [0385] March 2, 2015 filed a US patent application for SCANNER No. 29 / 519,017 (Zhou et al.);

[0386] 2015年3月9日提交的用于DESIGN PATTERN FOR SECURE STORE的美国专利申请号14 / 405,278 (Zhu 等人); [0386] US patent application number for DESIGN PATTERN FOR SECURE STORE of March 9, 2015, filed 14 / 405,278 (Zhu et al.);

[0387] 2015 年3 月18 日提交的用于DEC0DABLE INDICIA READING TERMINAL WITHCOMBINED ILLUMINAT1N 的美国专利申请号14 / 660,970 (Kearney 等人); [0387] US patent application number for DEC0DABLE INDICIA READING TERMINAL WITHCOMBINED ILLUMINAT1N of March 18, 2015, filed 14 / 660,970 (Kearney et al.);

[0388] 2015 年3 月18 日提价的用于REPROGRAMMING SYSTEM AND METHOD FOR DEVICESINCLUDING PROGRAMMING SYMBOL 的美国专利申请号14 / 661,013 (Soule 等人); [0388] March 18, 2015 U.S. Patent Application No. price for REPROGRAMMING SYSTEM AND METHOD FOR DEVICESINCLUDING PROGRAMMING SYMBOL of 14 / 661,013 (Soule et al.);

[0389] 2015 年3 月19 日提交的用于MULTIFUNCT1N POINT OF SALE SYSTEM 的美国专利申请号14 / 662,922 (Van Horn 等人); [0389] US patent application number for MULTIFUNCT1N POINT OF SALE SYSTEM of March 19, 2015, filed 14 / 662,922 (Van Horn et al.);

[0390] 2015 年3 月20 日提交的用于VEHICLE MOUNT COMPUTER WITH C0NFI⑶RABLEIGNIT1N SWITCH BEHAV1R 的美国专利申请号14 / 663,638 (Davis 等人); US patent application number is used VEHICLE MOUNT COMPUTER WITH C0NFI⑶RABLEIGNIT1N SWITCH BEHAV1R of [0390] March 20, 2015, filed 14 / 663,638 (Davis et al.);

[0391] 2015年3月20 日提交的用于METHOD AND APPLICAT1N FOR SCANNING A BARCODEWITH A SMART DEVICE WHILE CONTINUOUSLY RUNNING AND DISPLAYING AN APPLICAT1N ONTHE SMART DEVICE DISPLAY 的美国专利申请号14 / 664,063 (Todeschini); For METHOD AND APPLICAT1N FOR SCANNING A BARCODEWITH A SMART DEVICE WHILE CONTINUOUSLY RUNNING AND DISPLAYING AN APPLICAT1N ONTHE SMART DEVICE DISPLAY U.S. Patent Application No. [0391] 20 March 2015, filed 14 / 664,063 (Todeschini);

[0392] 2015 年3 月26 日提交的用于TRANSFORMING COMPONENTS OF A WEB PAGE TO VOICEPROMPTS的美国专利申请号14 / 669,280 (Funyak等人); [0392] March 26, 2015 filed US patent for TRANSFORMING COMPONENTS OF A WEB PAGE TO VOICEPROMPTS Application No. 14 / 669,280 (Funyak et al.);

[0393] 2015年3月31日提交的用于AHffiR FOR BARCODE SCANNING的美国专利申请号14 / 674,329 (Bidwell); [0393] US patent application number for AHffiR FOR BARCODE SCANNING of March 31, 2015, filed 14 / 674,329 (Bidwell);

[0394] 2015年4月1日提交的用于INDICIA READER的美国专利申请号14 / 676,109(Huck); [0394] US Patent Application No. INDICIA READER for the April 1, 2015, filed 14 / 676,109 (Huck);

[0395] 2015 年4 月1 日提交的用于DEVICE MANAGEMENT PROXY FOR SECURE DEVICES 的美国专利申请号14 / 676, 327 (Yeakley等人); [0395] for the DEVICE MANAGEMENT PROXY FOR SECURE DEVICES United States Patent Application No. 1 April 2015, filed 14/676, 327 (Yeakley et al.);

[0396] 2015 年4月2 日提交的用于NAVIGAT1N SYSTEM C0NFI ⑶ RED TO INTEGRATEMOT1N SENSING DEVICE INPUTS 的美国专利申请号14 / 676,898 (Showering); [0396] for NAVIGAT1N SYSTEM C0NFI ⑶ RED TO INTEGRATEMOT1N SENSING DEVICE INPUTS U.S. Patent Application No. 2 April 2015, filed 14 / 676,898 (Showering);

[0397] 2015 年4 月6 日提交的用于DMENS1NING SYSTEM CALIBRAT1N SYSTEMS ANDMETHODS的美国专利申请号14 /679,275 (Laffargue等人); [0397] US patent application number for DMENS1NING SYSTEM CALIBRAT1N SYSTEMS ANDMETHODS of April 6, 2015, filed 14 / 679,275 (Laffargue et al.);

[0398] 2015年4月7日提交的用于HANDLE FOR A TABLET COMPUTER的美国专利申请号29 / 523,098 (Bidwell 等人); [0398] April 7, 2015 filed US patent for HANDLE FOR A TABLET COMPUTER Application No. 29 / 523,098 (Bidwell et al.);

[0399] 2015 年4 月9 日提交的用于SYSTEM AND METHOD FOR POWER MANAGEMENT OFMOBILE DEVICES 的美国专利申请号14 / 682,615 (Murawski 等人); [0399] for SYSTEM AND METHOD FOR POWER MANAGEMENT OFMOBILE DEVICES United States Patent Application No. April 9, 2015, filed 14 / 682,615 (Murawski et al.);

[0400] 2015 年4 月15 日提交的用于MULTIPLE PLATFORM SUPPORT SYSTEM AND METHOD的美国专利申请号14 / 686, 822 (Qu等人); [0400] April 15, 2015 filed US patent for MULTIPLE PLATFORM SUPPORT SYSTEM AND METHOD Application Serial No. 14/686, 822 (Qu et al.);

[0401] 2015年4月15 日提交的用于SYSTEM FOR COMMUNICAT1N VIA A PERIPHERAL HUB的美国专利申请号14 / 687,289 (Kohtz等人); [0401] April 15, 2015, filed for SYSTEM FOR COMMUNICAT1N VIA A PERIPHERAL HUB U.S. Patent Application No. 14 / 687,289 (Kohtz et al.);

[0402] 2015年4月17日提交的用于SCANNER的美国专利申请号29 / 524,186(Zhou等人); [0402] April 17, 2015, filed for US Patent Application No. SCANNER 29 / 524,186 (Zhou et al.);

[0403] 2015年4月24日提交的用于MEDICAT1N MANAGEMENT SYSTEM的美国专利申请号14 / 695,364 (Sewell 等人); [0403] US patent application number for MEDICAT1N MANAGEMENT SYSTEM of April 24, 2015, filed 14 / 695,364 (Sewell et al.);

[0404] 2015 年4 月24 日提交的用于SECURE UNATTENDED NETWORK AUTHENTICAT1N 的美国专利申请号14 / 695,923 (Kubler等人); [0404] US Patent Application No. SECURE UNATTENDED NETWORK AUTHENTICAT1N for the April 24, 2015, filed 14 / 695,923 (Kubler et al.);

[0405] 2015 年4 月27 日提交的用于TABLET COMPUTER WITH REMOVABLE SCANNINGDEVICE的美国专利申请号29 / 525,068 (Schulte等人); [0405] April 27, 2015 filed US patent for TABLET COMPUTER WITH REMOVABLE SCANNINGDEVICE Application No. 29 / 525,068 (Schulte et al.);

[0406] 2015 年4 月29 日提交的用于SYMBOL READING SYSTEM HAVING PREDICTIVEDIAGNOSTICS的美国专利申请号14/ 699,436 (Nahill等人); [0406] for SYMBOL READING SYSTEM HAVING PREDICTIVEDIAGNOSTICS US Patent Application No. 29 April 2015, filed 14 / 699,436 (Nahill et al.);

[0407] 2015 年5 月1 日提交的用于SYSTEM AND METHOD FOR RE⑶LATING BARCODE DATAINJECT1N INTO A RUNNING APPLICAT1N ON A SMART DEVICE 的美国专利申请号14 /702, 110 (Todeschini 等人); [0407] May 1, 2015 U.S. Patent No., filed for SYSTEM AND METHOD FOR RE⑶LATING BARCODE DATAINJECT1N INTO A RUNNING APPLICAT1N ON A SMART DEVICE Application No. 14/702, 110 (Todeschini et al.);

[0408] 2015年5月4日提交的用于TRACKING BATTERY CONDIT1NS的美国专利申请号14 / 702, 979 (Young 等人); [0408] US Patent Application No. TRACKING BATTERY CONDIT1NS for the May 4, 2015, filed 14/702, 979 (Young et al.);

[0409] 2015年5月5日提交的用于INTERMEDIATE LINEAR POSIT1NING的美国专利申请号14 / 704,050 (Charpentier 等人); [0409] US Patent Application No. INTERMEDIATE LINEAR POSIT1NING for the May 5, 2015, filed 14 / 704,050 (Charpentier et al.);

[0410] 2015年5 月6 日提交的用于HANDS - FREE HUMAN MACHINE INTERFACE RESPONSIVETO A DRIVER OF A VEHICLE 的美国专利申请号14 / 705, 012 (Fitch 等人); [0410] May 6, 2015, filed for HANDS - US Patent FREE HUMAN MACHINE INTERFACE RESPONSIVETO A DRIVER OF A VEHICLE Application No. 14/705, 012 (Fitch et al.);

[0411] 2015 年5 月6 日提交的用于METHOD AND SYSTEM TO PROTECT SOFTWARE - BASEDNETWORK - CONNECTED DEVICES FROM ADVANCED PERSISTENT THREAT 的美国专利申请号14/ 705, 407 (Hussey 等人); For METHOD AND SYSTEM TO PROTECT SOFTWARE [0411] 2015 Nian 5 of filed May 6 - BASEDNETWORK - CONNECTED DEVICES FROM ADVANCED PERSISTENT THREAT US Patent Application Serial No. 14/705, 407 (Hussey et al.);

[0412] 2015 年5 月8 日提交的用于SYSTEM AND METHOD FOR DISPLAY OF INFORMAT1NUSING A VEHICLE - MOUNT COMPUTER 的美国专利申请号14 / 707,037 (Chamberlin); [0412] May 8, 2015, filed for SYSTEM AND METHOD FOR DISPLAY OF INFORMAT1NUSING A VEHICLE - MOUNT COMPUTER US Patent Application Serial No. 14 / 707,037 (Chamberlin);

[0413] 2015 年5 月8 日提交的用于APPLICAT1N INDEPENDENT DEX / UCS INTERFACE 的美国专利申请号14 / 707,123 (Pape); [0413] May 8, 2015, filed for APPLICAT1N INDEPENDENT DEX / UCS INTERFACE United States Patent Application No. 14 / 707,123 (Pape);

[0414] 2015 年5月8 日提交的用于METHOD AND APPARATUS FOR READING OPTICALINDICIA USING A PLURALITY OF DATA SOURCES 的美国专利申请号14 / 707,492 (Smith等人); US Patent Application No. for METHOD AND APPARATUS FOR READING OPTICALINDICIA USING A PLURALITY OF DATA SOURCES of [0414] May 8, 2015, filed 14 / 707,492 (Smith et al.);

[0415] 2015 年5 月13 日提交的用于PRE - PAID USAGE SYSTEM FOR ENCODEDINFORMAT1N READING TERMINALS 的美国专利申请号14 / 710,666 (Smith); [0415] for PRE 2015 Nian 5 of filed May 13 - PAID USAGE SYSTEM FOR ENCODEDINFORMAT1N READING TERMINALS US Patent Application No. 14 / 710,666 (Smith);

[0416] 2015年5月14日提交的用于CHARGING BASE的美国专利申请号29 / 526,918(Fitch 等人); [0416] May 14, 2015 filed US patent application for CHARGING BASE No. 29 / 526,918 (Fitch et al.);

[0417] 2015 年5 月19 日提交的用于AUGUMENTED REALITY ENABLED HAZARD DISPLAY 的美国专利申请号14 / 715,672 (Venkatesha等人); [0417] US Patent Application No. AUGUMENTED REALITY ENABLED HAZARD DISPLAY for the May 19, 2015, filed 14 / 715,672 (Venkatesha et al.);

[0418] 2015年5月19日提交的用于EVALUATING IMAGE VALUES的美国专利申请号14 /715,916 (Ackley); [0418] US Patent Application No. EVALUATING IMAGE VALUES for the May 19, 2015, filed 14 / 715,916 (Ackley);

[0419] 2015 年5 月27 日提交的用于INTERACTIVE USER INTERFACE FOR CAPTURING ADOCUMENT IN AN IMAGE SIGNAL 的美国专利申请号14 / 722,608 (Showering 等人); [0419] for INTERACTIVE USER INTERFACE FOR CAPTURING ADOCUMENT IN AN IMAGE SIGNAL United States Patent Application No. 27 May 2015, filed 14 / 722,608 (Showering et al.);

[0420] 2015年5月27日提交的用于IN - COUNTER BARCODE SCANNER的美国专利申请号29 /528, 165 (Oberpriller 等人); [0420] May 27, 2015, filed for IN - COUNTER BARCODE SCANNER US Patent Application Serial No. 29/528, 165 (Oberpriller et al.);

[0421] 2015年5 月28 日提交的用于ELECTRONIC DEVICE WITH WIRELESS PATH SELECT1NCAPABILITY的美国专利申请号14 / 724,134 (Wang等人); [0421] US patent application number for ELECTRONIC DEVICE WITH WIRELESS PATH SELECT1NCAPABILITY of May 28, 2015, filed 14 / 724,134 (Wang et al.);

[0422] 2015 年5 月29 日提交的用于METHOD OF PROGRAMMING THE DEFAULT CABLEINTERFACE SOFTWARE IN AN INDICIA READING DEVICE 的美国专利申请号14 / 724,849(Barten); US Patent Application No. for METHOD OF PROGRAMMING THE DEFAULT CABLEINTERFACE SOFTWARE IN AN INDICIA READING DEVICE of [0422] May 29, 2015, filed 14 / 724,849 (Barten);

[0423] 2015 年5 月29 日提交的用于IMAGING APPARATUS HAVING IMAGING ASSEMBLY 的美国专利申请号14 / 724, 908 (Barber等人); [0423] May 29, 2015 filed US patent for IMAGING APPARATUS HAVING IMAGING ASSEMBLY Application No. 14/724, 908 (Barber et al.);

[0424]用于 APPARATUS AND METHODS FOR MONITORING ONE OR MORE PORTABLE DATATERMINALS 的美国专利申请号14 / 725,352 (Caballero 等人); U.S. Patent No. [0424] for APPARATUS AND METHODS FOR MONITORING ONE OR MORE PORTABLE DATATERMINALS Application No. 14 / 725,352 (Caballero et al.);

[0425] 2015年5月29日提交的用于ELECTRONIC DEVICE的美国专利申请号29 /528,590 (Fitch 等人); [0425] May 29, 2015 filed US patent application for ELECTRONIC DEVICE No. 29 / 528,590 (Fitch et al.);

[0426] 2015年6月2日提交的用于MOBILE COMPUTER HOUSING的美国专利申请号29 /528,890 (Fitch 等人); [0426] June 2, 2015 filed a US patent for MOBILE COMPUTER HOUSING Application No. 29 / 528,890 (Fitch et al.);

[0427] 2015 年6 月2 日提交的用于DEVICE MANAGEMENT USING VIRTUAL INTERFACESCROSS - REFERENCE TO RELATED APPLICAT1NS 的美国专利申请号14 / 728,397(Caballero); For DEVICE MANAGEMENT USING VIRTUAL INTERFACESCROSS [0427] 2015 Nian filed May 2 of 6 - US Patent Application No. REFERENCE TO RELATED APPLICAT1NS of 14 / 728,397 (Caballero);

[0428] 2015年6月8日提交的用于DATA COLLECT1N MODULE AND SYSTEM的美国专利申请号14 / 732,870 (Powilleit); [0428] U.S. Patent Application No. DATA COLLECT1N MODULE AND SYSTEM for the June 8, 2015, filed 14 / 732,870 (Powilleit);

[0429] 2015年6月8日提交的用于INDICIA READING DEVICE的美国专利申请号29 /529,441 (Zhou 等人); [0429] June 8, 2015, filed for INDICIA READING DEVICE US Patent Application Serial No. 29 / 529,441 (Zhou et al.);

[0430] 2015年6 月10 日提交的用于INDICIA - READING SYSTEMS HAVING AN INTERFACEWITH A USER ' S NERVOUS SYSTEM 的美国专利申请号14 / 735,717 (Todeschini); [0430] June 10, 2015, filed for INDICIA - READING SYSTEMS HAVING AN INTERFACEWITH A USER 'S NERVOUS SYSTEM U.S. Patent Application No. 14 / 735,717 (Todeschini);

[0431] 2015 年6 月12 日提交的用于METHOD OF AND SYSTEM FOR DETECTING OBJECTWEIGHING INTERFERENCES 的美国专利申请号14 / 738,038 (Amundsen 等人); US Patent Application No. for METHOD OF AND SYSTEM FOR DETECTING OBJECTWEIGHING INTERFERENCES of [0431] June 12, 2015, filed 14 / 738,038 (Amundsen et al.);

[0432] 2015年6月16 日提交的用于TACTILE SWITCH FOR A MOBILE ELECTRONIC DEVICE的美国专利申请号14 / 740, 320 (Barndringa); [0432] June 16, 2015 U.S. Patent No., filed for TACTILE SWITCH FOR A MOBILE ELECTRONIC DEVICE Application No. 14/740, 320 (Barndringa);

[0433] 2015年6月16日提交的用于CALIBRATING A VOLUME DMENS1NER的美国专利申请号14 / 740,373 (Ackley 等人); [0433] US patent application number for CALIBRATING A VOLUME DMENS1NER of June 16, 2015, filed 14 / 740,373 (Ackley et al.);

[0434] 2015年6 月18 日提交的用于INDICIA READING SYSTEM EMPLOYING DIGITAL GAINCONTROL的美国专利申请号14 / 742,818 (Xian等人); [0434] for INDICIA READING SYSTEM EMPLOYING DIGITAL GAINCONTROL U.S. Patent Application No. June 18, 2015, filed 14 / 742,818 (Xian et al.);

[0435] 2015 年6 月18 日提交的用于WIRELESS MESH POINT PORTABLE DATA TERMINAL 的美国专利申请号14 / 743, 257 (Wang等人); [0435] June 18, 2015 U.S. Patent No., filed for WIRELESS MESH POINT PORTABLE DATA TERMINAL Application No. 14/743, 257 (Wang et al.);

[0436] 2015年6月18日提交的用于CYCLONE的美国专利申请号29 / 530,600 (Vargo等人); [0436] June 18, 2015, filed for US Patent Application No. CYCLONE 29 / 530,600 (Vargo et al.);

[0437] 2015 年6 月19 日提交的用于IMAGING APPARATUS COMPRISING IMAGE SENSORARRAY HAVING SHARED GLOBAL SHUTTER CIRCUITRY 的美国专利申请号14 / 744,633(Wang); [0437] for IMAGING APPARATUS COMPRISING IMAGE SENSORARRAY HAVING SHARED GLOBAL SHUTTER CIRCUITRY US Patent Application No. 19 June 2015, filed 14 / 744,633 (Wang);

[0438] 2015年6月19 日提交的用于CLOUD - BASED SYSTEM FOR READING OF DEC0DABLEINDICIA的美国专利申请号14 / 744,836 (Todeschini等人); [0438] for CLOUD 2015 Nian 6 filed on May 19 the - BASED SYSTEM FOR READING OF DEC0DABLEINDICIA US Patent Application No. 14 / 744,836 (Todeschini et al.);

[0439] 2015 年6 月19 日提交的用于SELECTIVE OUTPUT OF DECODED MESSAGE DATA 的美国专利申请号14 / 745,006 (Todeschini等人); [0439] for SELECTIVE OUTPUT OF DECODED MESSAGE DATA United States Patent Application No. 19 June 2015, filed 14 / 745,006 (Todeschini et al.);

[0440] 2015年6月23日提交的用于OPTICAL PATTERN PROJECTOR的美国专利申请号14/ 747, 197 (Thuries 等人); [0440] June 23, 2015 filed US patent for OPTICAL PATTERN PROJECTOR Application No. 14/747, 197 (Thuries et al.);

[0441] 2015 年6 月23 日提交的用于DUAL-PR0JECT0R THREE - DIMENS1NAL SCANNER 的美国专利申请号14 / 747, 490 (Jovanovski等人);和 [0441] for DUAL-PR0JECT0R THREE 2015 Nian 6 filed on May 23 - the United States Patent Application No. DIMENS1NAL SCANNER of 14/747, 490 (Jovanovski et al.); And

[0442] 2015 年6 月24 日提交的用于CORDLESS INDICIA READER WITH A MULTIFUNCT1NCOIL FOR WIRELESS CHARGING AND EAS DEACTIVAT1N的美国专利申请号14/748,446(Xie等人)。 [0442] June 24, 2015, filed for CORDLESS INDICIA READER WITH A MULTIFUNCT1NCOIL FOR WIRELESS CHARGING AND EAS DEACTIVAT1N US Patent Application No. 14 / 748,446 (Xie et al.).

[0443] 在本说明书和/或附图中,已公开了本实用新型的典型实施例。 [0443] In the present specification and / or drawings, the present invention has been disclosed exemplary embodiments. 本实用新型不限于此类示例性实施例。 The present invention is not limited to such exemplary embodiments. 术语“和/或”的使用包括关联列出项目中的一个或多个的任何和所有组合。 The term "and / or" includes the use of any of the associated listed items and all combinations of one or more of. 附图是示意性表示且因此不一定按比例描绘。 The drawings are schematic representations, and thus are not necessarily drawn to scale. 除非另外说明,特定术语已经在一般且描述性意义上使用的且并不用于限制的目的。 Unless otherwise noted, specific terms have been used in a generic and descriptive sense only and not for purposes of limitation.

Claims (15)

  1. 1.一种条形码扫描设备,包括: 光源,被配置成发射光束; 第一传感器,被配置成检测指不反射离开条形码的光的第一光信号,反射光源自于光源且源自于在条形码扫描设备附近的至少一个环境光源; 第二传感器,被配置成检测指示源自于所述至少一个环境光源的光的第二光信号;以及噪声消除电路,被配置成从第一和第二光信号获得噪声消除扫描信号。 A bar code scanning apparatus comprising: a light source configured to emit a light beam; a first sensor configured to detect the light signal means that the first light is not reflected off of the bar code, the reflected light from the light source and the bar code is derived from at least one ambient light source close to the scanning device; a second sensor configured to detect an indication originating from the second optical signal to the at least one ambient light source; and a noise canceling circuit is configured from the first and second light scanning signals obtained noise cancellation signal.
  2. 2.权利要求1的条形码扫描设备,其中,所述噪声消除电路包括被配置成从第一光信号减去第二光信号以获得噪声消除扫描信号的差分放大器。 Bar code scanning apparatus of claim 1, wherein the noise elimination circuit configured to include a first optical signal from the optical signal to obtain a second subtracting the noise cancellation signal scanning differential amplifier.
  3. 3.权利要求1的条形码扫描设备,其中,所述第一和第二传感器包括用于感测光的光电二极管。 Bar code scanning apparatus of claim 1, wherein said first and second sensor comprises a photodiode for sensing light.
  4. 4.权利要求1的条形码扫描设备,其中,所述第一传感器包括至少涵盖光束在那里被指引在条形码上的光斑的第一视场。 Bar code scanning apparatus of claim 1, wherein the first sensor comprises a first field of view covers at least the light beam where it is directed at the spot on the bar code.
  5. 5.权利要求4的条形码扫描设备,其中,所述第二传感器包括涵盖接近于第一视场的区域的第二视场。 Bar code scanning apparatus of claim 4, wherein said second sensor comprises a second field of view coverage area close to the first field of view.
  6. 6.权利要求4的条形码扫描设备,其中,所述第二传感器包括具有涵盖在第一视场的一侧的第一区域的第二视场和涵盖在第一视场的相对侧的第二区域的第三视场的多个传感器。 A second bar code scanning apparatus of claim 4, wherein said second sensor comprises a second field of view covered by the first field and the opposite side having a first side of the first region encompassed by the field of view a plurality of sensors of the third field of view region.
  7. 7.权利要求4的条形码扫描设备,其中,所述第二传感器包括涵盖围绕第一视场的区域的第二视场。 Bar code scanning apparatus of claim 4, wherein said second sensor comprises a second field of view about the coverage area of ​​the first field of view.
  8. 8.权利要求7的条形码扫描设备,还包括在反射镜的中心具有孔的反射镜,其中,所述第一传感器被配置成感测通过孔照射的光,并且所述第二传感器被配置成感测反射离开反射镜的光。 Bar code scanning apparatus of claim 7, further comprising a mirror having a hole in the center of the mirror, wherein the first sensor is configured to sense light emitted through the aperture, and the second sensor is configured to sensing light reflected off the mirror.
  9. 9.一种噪声消除电路,包括: 至少一个光学传感器,被配置成在第一级中检测第一光信号并在第二级中检测第二光信号;以及差分放大器,被配置成从第一光信号减去第二光信号以由此从第一光信号去除噪声分量; 其中,所述第一光信号包括激光扫描分量和噪声分量,所述噪声分量对应于来自至少一个环境光源的环境光; 其中,所述第二光信号包括噪声分量;以及其中,所述差分放大器被配置成输出噪声消除扫描信号。 A noise canceling circuit, comprising: at least one optical sensor is configured to detect a first optical signal at a first stage and a second optical signal detected in the second stage; and a differential amplifier is configured from a first an optical signal by subtracting the second optical signal to thereby remove the noise component from the first optical signal; wherein the first optical signal comprises a laser scanning component and a noise component, the noise component corresponding to the ambient light from the at least one ambient light source ; wherein said second optical signal comprising a noise component; and wherein the differential amplifier is configured to output the noise cancellation signal scan.
  10. 10.权利要求9的噪声消除电路,其中,所述至少一个光学传感器包括第一光学传感器和第二光学传感器,所述第一光学传感器具有至少涵盖光束被指引到那里的光斑的第一视场,并且所述第二光学传感器具有涵盖邻近于第一视场的区域第二视场。 10. The noise cancellation circuit of claim 9, wherein said at least one optical sensor comprises a first optical sensor and a second optical sensor, the first optical sensor having a field of view covering at least a first light beam is directed to the spot where and the second optical sensor having a field of view encompassing a second field of view adjacent to the first region.
  11. 11.权利要求9的噪声消除电路,其中,所述至少一个光学传感器包括单个光学传感器。 11. The noise cancellation circuit of claim 9, wherein said at least one optical sensor comprises a single optical sensor.
  12. 12.权利要求11的噪声消除电路,还包括晶体管,其被配置成响应于调制输入信号而接通和关断可见光激光二极管,其中,所述单个光学传感器被配置成在第一级中检测第一光信号并在第二级中检测第二光信号,并且其中,所述第一光信号包括来自可见光激光二极管的激光扫描分量。 12. The noise cancellation circuit of claim 11, further comprising a transistor that is configured to respond to the modulated input signal and is turned off visible laser diode, wherein said single optical sensor is configured to detect the first in a first stage an optical signal and detecting a second optical signal in a second stage, and wherein the first optical signal comprises a laser scanning components from the visible laser diode.
  13. 13.权利要求11的噪声消除电路,还包括相移电路和延迟线,所述相移电路被配置成接收第一光信号,并且所述延迟线被配置成接收第二光信号。 11 13. The noise cancellation circuit as claimed in claim, further comprising a phase shift circuits and the delay line, the phase-shifting circuit receiving the first optical signal is arranged, and the delay line receiving the second optical signal is configured.
  14. 14.权利要求11的噪声消除电路,还包括第一采样和保持电路以及第二采样和保持电路,所述第一采样和保持电路被配置成接收第一光信号,并且所述第二采样和保持电路被配置成接收第二光信号。 11 14. The noise cancellation circuit as claimed in claim, further comprising a first and a second sample and hold circuits sample and hold circuit, said first sample and hold circuit is configured to receive the first optical signal and the second sampling, and hold circuit is configured to receive a second optical signal.
  15. 15.权利要求11的噪声消除电路,还包括陷波滤波器和频率匹配电路。 15. The noise cancellation circuit of claim 11, further comprising a notch filter and frequency matching circuit.
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